IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0154071
(2002-05-23)
|
발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
6 |
초록
▼
An economical jack stand for use with a power unit has a rectangular base plate with a tubular housing having a lower end attached to the base plate. A "U" shaped ratchet shaft with ratchet teeth on the forward edges thereof, is telescopically inserted within the housing and is extendable and retrac
An economical jack stand for use with a power unit has a rectangular base plate with a tubular housing having a lower end attached to the base plate. A "U" shaped ratchet shaft with ratchet teeth on the forward edges thereof, is telescopically inserted within the housing and is extendable and retractable therein. The jack stand has a pair of pawls interconnected by a pin, with each pawl adapted to be engagable with a respective tooth on the ratchet shaft, and with the pin pivotally attached to the upper end of the housing. An actuator spring is secured to the pin forming a handle for rotating the pawls into engagement with the teeth of the shaft, and further for rotating the pawls for disengagement from the teeth of the shaft. The components are suitably formed from standard sheet metal and metal plate stock with minimal machining and welding required to form and assemble the economical jack stand.
대표청구항
▼
1. An economical jack stand for use with a power unit, comprising a rectangular base plate; a tubular housing having a forward side, a rearward side, a left and right side, an upper end and a lower end, with the lower end attached to said base plate and said housing extending vertically therefro
1. An economical jack stand for use with a power unit, comprising a rectangular base plate; a tubular housing having a forward side, a rearward side, a left and right side, an upper end and a lower end, with the lower end attached to said base plate and said housing extending vertically therefrom; a "U" shaped ratchet shaft having a back side, left side, right side, an upper end and a lower end, with ratchet teeth on the forward edges thereof, telescopically inserted within said housing and extendable and retractable therein; a lift collar mounted on the upper end of said shaft; a pair of pawls interconnected by a pin, with each pawl adapted to be engagable with a respective tooth of said shaft, with said pin pivotally attached to the upper end of said housing; and an actuating spring secured to said pin forming a handle for rotating said pawls into engagement with the teeth of said shaft, and further for rotating said pawls into disengagement from the teeth of said shaft. 2. The jack stand as in claim 1, wherein said housing includes tabs extending downward from the lower ends of at lease two sides of said housing; and wherein said base plate includes slotted apertures therein for receiving and securing the tabs. 3. The jack stand as in claim 1, wherein said housing further includes lateral protrusions at the lower end of the left and right side thereof, and adapted to be engagable with a "U" shaped opening in the forward end of the power unit. 4. The jack stand as in claim 1, wherein said housing further includes a vertical slot in at least one side thereof; and said shaft includes a lug mounted on the lower end of said shaft adapted to extend and slide within the slot in said housing for retaining and stabilizing said shaft in said housing. 5. The jack stand as in claim 1, wherein said housing is cylindrical in shape, and said shaft is semi-cylindrical. 6. The jack stand as in claim 1, wherein said tubular housing is rectangular in cross section. 7. The jack stand as in claim 1, wherein said pawls have "D" shaped apertures therein and the pin has a "D" shaped cross section for orienting said pawls on the pin. 8. The jack stand as in claim 7, wherein the actuating spring has an upper end attached to the D-pin, and has a generally vertical handle portion, and has a generally horizontal lower portion including a first position indention and a second position indention. 9. The jack stand as in claim 8, wherein said housing includes a slotted opening adapted to receive the lower portion of said actuator spring whereby the first position indention is engagable with the slotted opening to position the pawls into engagement with the teeth of said ratchet shaft, and the second position indention is engagable with the slotted opening to position the pawls into disengagement from the teeth of said ratchet shaft. 10. The jack stand as in claim 1, wherein said tubular housing is formed from a piece of sheet metal having a flat pattern defining the areas of the rearward side in the center thereof, with the areas of the left and right sides extending outward therefrom, and the areas of one half of the front side each extending outward from the respective right and left side, and with the rearward side, the left and right sides and the two halves of the front side each having a tab extending outward from the lower end thereof adapted for engagement with the slotted apertures of said base plate, and with the upper end of each half front side including a side flange each having an aperture for receiving said pin, and half of a front cover plate extending from the side of the flanges of the halves of the front side.
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